AC Inverter Drives. For selection and product demonstration, please contact any of our branch offices listed below:

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1 For selection and product demonstration, please contact any of our branch offices listed below: REGISTERED OFFICE AND HEAD OFFICE L&T House, Ballard Estate P. O. Box 278 Mumbai Telephone: Fax: Website: ELECTRICAL STANDARD PRODUCTS (ESP) 50, Sakar Complex Opp. Gandhigram Rly. Station Ashram Road Ahmedabad Tel: , / Fax: , Cubbon Road, Post Box 5098 Bangalore Tel: / 25 Fax: espblr@lntebg.com /, Zone II Maharana Pratap Nagar Bhopal Tel: /8/9 Fax: espbho@lntebg.com Plot No. 559, Annapurna Complex Lewis Road Bhubaneswar Tel: , Fax: espbbi@lntebg.com SCO 2, Sector 26D Madhya Marg, P. O. Box 4 Chandigarh Tel: /5 Fax: espchd@lntebg.com 0, Club House Road Chennai Tel: / 4 Fax: espmaa@lntebg.com 67, Appuswamy Road Post Bag 756 Opp. Nirmala College Coimbatore Tel: , Fax: espcbe@lntebg.com L&T House Group MIG 5 Padmanabhpur Durg Tel: , Fax: A/, Astronauts Avenue Bidhan Nagar Durgapur 7 22 Tel: /952 Fax: espdgp@lntebg.com (Faridabad Switchgear Works) 2/4, DelhiMathura Road Faridabad 2 00 Tel: , Fax: espfbd@lntebg.com Milanpur Road, Bamuni Maidan Guwahati Tel: Fax: espgau@lntebg.com 507, Fateh Maidan Road P. O. Box 2 Hyderabad Tel: Fax: esphyd@lntebg.com D24, Prithvi Raj Road CScheme Jaipur Tel: /86 Fax: espjai@lntebg.com Akashdeep Plaza, 2nd Floor P. O. Golmuri Jamshedpur 8 00 Jharkhand Tel: Fax: espjam@lntebg.com Skybright Bldg. M.G. Road Ravipuram Junction Ernakulam Kochi Tel: , Fax: espcok@lntebg.com B, Shakespeare Sarani Kolkata Tel: /2//4/5, Fax: espccu@lntebg.com A28,Indira Nagar Faizabad Road Lucknow Uttar Pradesh Tel: /902/90 Fax: esplko@lntebg.com Plot No. 58 4th Main Road K.K. Nagar Madurai Tel: /0 Fax: espmdu@lntebg.com North Wing, Level II, Gate 7, Powai Mumbai Tel: /266/277 Fax: espbom@lntebg.com 8B, Farmland, Ramdaspeth Behind Hotel Radhika Nagpur Tel: /24 Fax: espngp@lntebg.com 2, Shivaji Marg, P.O. Box 622 New Delhi 0 05 Tel: /, Fax: espdel@lntebg.com L&T House, P.O. Box 9 9/, Dhole Patil Road Pune 4 00 Tel: , 2656 Fax: , esppnq@lntebg.com rd Floor, Vishwakarma Chambers Majura Gate, Ring Road Surat Tel: Fax: espsur@lntebg.com Radhadaya Complex Old Padra Road Near Charotar Society Vadodara Tel: //2 Fax: espbar@lntebg.com AC Inverter Drives 4886, Dwarakanagar Visakhapatnam Tel: , Fax: espviz@lntebg.com Product improvement is a continuous process. For the latest information and special applications, please contact any of our offices listed here. Electrical Standard Products Larsen & Toubro Limited Powai Campus, Mumbai Tel. No: Fax: /746 esp@lntebg.com Website: SP50426 R UO/60706

2 The New Generation of AC Drives Salient Features of J7, V7, F7 & V000 Drives L&T SWITCHGEAR Performance Features Protective Features User Friendly Features Larsen & Toubro s New Generation AC Drives incorporate the latest technological advancements in AC induction motor speed control. Performance and Technology L&T offers a range of performance The New Generation Drives are Adjustable Scurves for acceleration and deceleration DC injection braking: at start or stop loss ridethrough for protection against momentary power loss/under voltage Volts/Frequency ratio: fully adjustable Drive efficiency: 96 to 98% Displacement power factor: 0.98 Output frequency:.0 to 400 Hz Torque boost: full range Critical frequency rejection settings Carrier frequency is selectable Torque limit Heat sink overheat to give overload protection to inverter Currentlimiting DC bus fuse to protect inverter Motor overload protection Phasetophase, ground fault and short circuit protection Over/under torque protection Short circuit withstanding rating: 65kA RMS Input/output single phasing protection Opticallyisolated controls: to completely isolate control circuit from power circuit Digital keypad operator Copy keypad function 24 VDC control logic for sourcing sourcing outputs (both PNP or NPN transistors) RJ45 style digital operator connector Multi speed settings plus jog speed Flash RAM software memory for update Split front cover for easy wiring Heat sink fan: Plugin with onoff control choices and innovative technologies. factoryprogrammed and ready to Control methods include V/f, open run. J7, V7, V000 & F7 drives loop vector and closed loop vector have standard LED display. The control for speed regulation choices. keypad is intuitive and includes parametercopying functions to copy parameters from one drive to Standards & Reliability another. MTBF: Exceeds 28 years Tested on fullyloaded motors Surface mount technology Protective PCB coating 0.6G or less (20 to 55Hz) UL, cul and CE listed Commissioning Software: Drive Wizard This support tool is a windows based PC program designed to make commissioning and troubleshooting of these drives as simple as possible. The user friendly Drive Wizard exchanges data with drive and data can be retrieved, reviewed, changed, stored and graphed. J7, V7, V000 & F7 AC Drives are manufactured by : YASAKAWA Electric Corporation JAPAN

3 J7Micro Size OEM Drive STANDARD SPECIFICATIONS J7 Hz % The J7 drive is a general purpose AC drive; its sine wave PWM design provides low motor noise and high starting torque, with a current overload rating of 50% for 60 seconds. The J7 is featurepacked, compact yet economical and its V/f control makes the drive suitable for most of the general applications. The digital operator includes a digit LED status display. An optional RS485 Modbus RTU serial communication port is available. An ideal choice whenever economy and Common Applications Conveyors Grinders Centrifuges Pumps Fans Blowers Mixers Commercial Laundry Automotive Assembly Packaging Equipment Material Handling Features Full range automatic torque boost function can deliver outstanding starting torque High speed current limiting function for tripless operation Slip compensation function for excellent speed regulation Speed search function for automatic restart after power loss Compact space saving design with uniform height of 28mm on all models Frequency accuracy (temperature change) 0. Sec. to 999 Secs 0 C to 50 C (Optional) compactness are required. 2

4 V7Multi Functional Industrial Drive Voltage Class MODEL CIMRV7AA Max. applicable KW Motor output HP* Control Characteristics STANDARD SPECIFICATIONS Inverter rated kva Rated output current (A) Max. output voltage (V) Rated input volt and frequency Max. output frequency Rated input voltage and frequency 40P three phase L&T SWITCHGEAR 40P7 4P5 42P2 4P0 4P7 45P5 47P to 460 V (proportional to input voltage) phase,80 to 460 V, 50/60Hz 400Hz phase, 80 to 460 V, 50/60Hz 5 0 V7 Allowable frequency fluctuation +/5% Supply Allowable voltage fluctuation Speed control range 5% to +0% :20 (V/f), :40 (OLV) Control Method V/f and Open Loop Control Overload capacity 50% rated output current for 60 sec Accel / Decel time 0.0 to 6000 sec V7 is a high performance AC drive for induction motor. Its PWM design provides low motor noise and high starting torque. It provides best speed regulation by two control methods, V/f and open loop vector control which provides high torque at low speed. The V7 is intended for constant torque application, with current overload rating of 50% for 60 sec. The digital operator provides 4digit LED status display with a builtin analog speed potentiometer and more than 200 programming parameters. Conveyors Grinders Centrifuges Pumps Fans Blowers Machine Tools Packaging Food Processing Commercial Laundry Features Vector control without feedback provides excellent starting torque and performance High speed current limit function to eliminate nuisance trip Copy keypad function for convenient parameter uploading and downloading Digital operator interface for easy and quick configuration Speed search function for starting a coasting motor to desired frequency Dynamic Braking Transistor is standard for low cost braking with optional resistor Output Characteristics Carrier frequency Output frequency resolution Frequency reference signal Braking torque Frequency accuracy (temp. change) Protection Programmable I/O Main control functions 0 khz 0.0 Hz 0 to 0 V,4 to 20mA, 0 to 20mA, pulse train input (max 0kHz),upfront speed control potentiometer or MEMOBUS comm Braking transistor builtin,braking torque in excess of 00% achievable Digital reference: +/0.0% (0 to +50*C) Analog reference: +/0.5% (25 +/ to 0*C) Motor overload, power loss ride through, fin overheat, over/under voltage, stall prevention, shot ckt, current limiting, ground fault,over/under torque 7 discrete input, discrete output, analog output, analog input, pulse train input & pulse train output Up to79 parameters including vector control, RS485/ KB MEMOBUS comms, constants copy, PID control, every savings, speed search 6step multispeed, Scurves, dual acce/decelerates, dc injection braking, momentary power loss (0.5 sec), slip commensation (even during regen), UP/DOWN Envionment Working ambient temperature Humidity Location 0 C to 50 C 90% RH or less (noncondensing) Indoor (free from corrosive gases or dust) and with in 000m MSL elevation * Based on a standard 4pole motor for max. applicable motor output 4 5

5 V000 STANDARD SPECIFICATIONS Compact Current Control Vector Drive Normal & 200 V Class (Threephase/Singlephase) Input Model ThreePhase * SinglePhase Max. Applicable Motor *2 Capacity kw Rated Input Current Rated Output Capacity A Three Phase Single Phase kva Rated Output Current A CIMRVT2A CIMRVTBA (.) V000 Output Overload Tolerance Rating: 20% of rated output current for 60 sec Rating: 50% of rated output current for 60 sec The V000 drive is incredibly compact, technologically advanced, environmentally responsible package capable of driving induction as well as synchronous motor. With its preset application function and dual rating it can handle wide variety of application ranging from Fan, Pump Compressor, Elevator, Crane Conveyor and many more. V000 employs dual CPU concept that is 4 times faster than other drives, which improves motor control performance especially in vector control applications. Custom software, network communications, plugin I/O cards, packaging options as among the many choices. V000 with its highly advanced features stands out in its class and a perfect solutions for most of your applications. Common Applications Pump Fan HVAC (AHU) Conveyor Air Compressor Crane Hoist Crane (Travel) Elevator Packaging machines Extruders Centrifuge Features 0 years performance life design and selection depending on the application Single drive for both Induction & permanent magnet motors Drive customization / PLC functionality Dual microprocessor for faster control Rotation & Static Autotuning Online Autotuning 200% starting torque Allows side by side mountingreduces panel space High flux braking for faster stopping without use of braking resistors Intelligent detachable terminal block Stores last 0 faults High speed serial communication at 5kbps Optional LCD operator Carrier Frequency Max. Output Voltage Max. Output Frequency 400 Hz Rated Voltage/Rated Frequency Allowable Voltage Fluctuation Allowable Frequency Fluctuation Supply kva Phase Three Single Phase 2 khz (userset, up to 5 khz possible) ThreePhase Supply: ThreePhase 200 to 240 V (relative to input voltage) SinglePhase Supply: ThreePhase 200 to 240 V (relative to input voltage) 400 Hz ThreePhase Supply: ThreePhase 200 to 240 V 50/60 Hz SinglePhase Supply: SinglePhase 200 to 240 V 50/60 Hz 5 to 0% *: Drives with a singlephase power supply input have Threephase output and cannot be used for single phase motors. *2: Based on a standard 4pole motor for max. applicable motor output. Note: Value inside parenthesis is for a singlephase drive. 400 V Class (Threephase) Max. Applicable Motor * Capacity kw Input Output Model CIMRVT4A Rated Input Current A Rated Output Capacity Rated Output Current A Overload Tolerance Carrier Frequency Max. Output Voltage kva Max. Output Frequency Rated Voltage/Rated Frequency Allowable Voltage Fluctuation Allowable Frequency Fluctuation Supply kva 000 *: Based on a standard 4pole motor for max. applicable motor output ±5% Rating: 20% of rated output current for 60 sec Rating: 50% of rated output current for 60 sec 2 khz (userset, up to 5 khz possible) ThreePhase 80 to 480 V (relative to input voltage) 400 Hz (userset) ThreePhase 80 to 480 V 50/60 Hz 5 to 0% ±5%

6 COMMON SPECIFICATION MODEL SELECTION BY MOTOR CAPACITY Open Loop Vector Control (Current Vector), V/f Control, PM Open Loop Vector Control (for SPM and IPM motors) MODEL PH 220V INPUT CIMRVTBA000BAA CIMRVTBA0002BAA CIMRVTBA000BAA CIMRVTBA0006BAA CIMRVTBA000BAA CIMRVTBA002BAA CIMRVTBA008BAA %/0.5 Hz 50%/6 Hz Momentary power loss ridethru, Speed search, Over torque detection, Torque limit, 7step speed (max), Accel/Decel time switch, SCurve accel/decel, wire sequence, AutoTuning (Rotational, Stationary tuning for resistance between lines), Cooling fan on/off switch, Slip compensation, Torque compensation, Frequency jump, Upper/Lower limits for frequency reference, DC lnjection braking at start and stop, High slip braking, PID control (With sleep function), Energy saving Control, Memobus comm. (RS485/422 max 5.2 kbps), Fault restart, Application presets, Removable terminal block with parameter backup function Motor overheat protection based on output current, Momentary overcurrent protection, Overload p rotection, Overvoltage protection, Undervoltage protection, Momentary power loss ridethru, Heatsink oveheat, Braking resistance overheat protection, Stall prevention, Ground fault protection PH 220V INPUT CIMRVT2A000BAA CIMRVT2A0002BAA CIMRVT2A0004BAA CIMRVT2A0006BAA CIMRVT2A0008BAA CIMRVT2A000BAA CIMRVT2A002BAA CIMRVT2A008BAA CIMRVT2A0020BAA CIMRVT2A000FAA CIMRVT2A0040FAA CIMRVT2A0056FAA CIMRVT2A0069FAA PH 45V INPUT CIMRVT4A000BAA CIMRVT4A0002BAA CIMRVT4A0004BAA CIMRVT4A0005BAA CIMRVT4A0007BAA CIMRVT4A0009BAA CIMRVT4A00BAA CIMRVT4A008FAA CIMRVT4A002FAA CIMRVT4A00FAA CIMRVT4A008FAA Application Application 20% Overload for min on inverter rated output current fans, pumps, variable torque load and application which do not require high overload 50% overload for min on inverter rated output current Constant torque or impact load, like elevator, crane, compressor, Centrifuges and mixers with high viscosity material 8 9

7 STANDARD SPECIFICATIONS Indusrial Workhorse F7Normal And F7, Closed loop vector control 0.02 (flux control) The F7 drive is the Industrial Workhorse of adjustable frequency drives. It is intended to handle every conventional drive application found in the typical industrial manufacturing plant from simple variable torque pumping to sophisticated networked material handling. With excellent performance and a wide array of configurations and options, the F7 drive can be the single drive platform Common Applications Conveyors Mixers Machine tools Cuttolength Centrifugal Pumps Centrifuges Extruders Packaging Machines Features Constant or variable torque operation for the flexibility to handle all industrial applications Rotational and static Autotuning for ease of motor configuration Closed or open loop vector can deliver outstanding starting torque and performance High speed current limiting to prevent nuisance trips resolution +0 to 0 for an entire facility. Network communications, plugin I/O cards, custom software, and power /packaging options are among the many choices. For new installations or retrofits, F7 drive is truly the Industrial Workhorse, perfect for High Slip Braking reduces installation cost and eliminates the need for additional braking Communication options that support all major industrial networks LCD operator (optional) Enclosed wallmounted type (NEMA ) : 8.5 kw or less, Open chassis type (IP00): 22 kw or more every conventional application and even some unconventional ones. o o 2. Drive Ratings are for ambient temperature of 45 C. For use beyond 45 C, derate by.% per degree rise in temperature. 0

8 L&T SWITCHGEAR SAFE & SURE RECOMMENDED RATINGS OF REACTORS FOR ALL DRIVES MODEL Options & Accessories OPTIONS, PERIPHERAL DEVICES. Input line reactor should be a three phase, Iron core air cooled reactor. 2. Output line reactor should be a three phase, Iron core air cooled reactor.. DC reactor should be a single phase, Iron core air cooled reactor. Braking Units and Resistors for V7,F7 & V000 Drive Accessories Braking Resistor Qty. Applicable For Qty. Resistance /N 2

9 Dimensions & Weights J7 Drive Dimensions V7 Drive & Weights (For 200V PHASE) (For 400V PHASE) Mechanical Dimension And Weight For 400V Phase Model Capacity In KW (HP) 0.2(0.25) 0.4(0.5) 0.75() (2) Reference 08(96) 08(96) 08(96) 08(96) Dimensions in mm 28(8) 28(8) 28(8) 28(8) Mass Figure W (W) H (H) D In KG. Dimensions & Weights 2.2() 08(96) 28(8) 56.7(5) 40(28) 28(8) 4 2. () 80(64) 260(244) (0) 80(64) 260(244) Figure H H W W H2 8.5 (0.4) D Dimensions in mm Figure2 All mounting screws are M4 Dimensions in mm Figure 4 5

10 Dimensions F7 Drive & Weights Dimensions & Weights V000 Drive Enclosures Voltage Class 200 V Class Singlephase MODEL CIMR VT BA000 BA0002 BA000 BA0006 BA000 BA002 BA008 4A000 4A0002 4A0004 4A0005 4A0007 4A0009 4A00 4A008* 4A002* 4A00* 4A008* Figure 2 Dimensions (mm) Weight W H D W H H2 D t Mtg. Holes M M M M4? M M M M M M M M M M M M M M5 Weight kg Cooling Fan cooled 400 V Class Threephase Selfcooled Selfcooled Fan cooled Fan cooled OpenChassis (Ip20) 2M4 t Enclosure Panel 4M4 W W H2 H H D D W W H H H2 D D t Figure Figure 2 Dimensions in mm Figure4 6 7

11 Application Examples Fans and Blowers (contributes to EnergySaving and Improved Performance) Pump (Ease of Automatic Control Ensures Performance Consistency) Example of the Use of Inverter with Air Scrubber MC Block Diagram of Feed Water Pump Application Feeding Water Pressure Detector Exhaust Supply Controller MC Frequncy Reference 420 ma Varispeed F7 R S T R V W MC2 Dust Collection Device Damper M BLOWER Motor Machine Operating Panel Supply PID Control/Manual Control Target Value/Frequency Reference Value Varispeed F7 R.S.T. U.V.W. PID Frequency Reference Value Motor M Flow Switch Pump Supply R S T Frequency Reference 420 ma Application Example RUNX MC Dust Collection System Blower, Fan for Boilers Fan for Cooling Towers R s T Varispeed F7 SFWD/S S7Speed Search SC A2 AC Digital Operator Signal during Run P M M2 PC User s Requirements Switch commercial power supply and inverter drive without stopping the motor. To start a coasting motor to desired frequency without stopping the motor. Save energy since the load is not heavy at lowspeed operation. Avoid overload tripping. Continue operation even when momentary power loss not longer than 2 second occur. Continue operation in case of loss of reference signal. Monitor output power. MC MC2 R/ min lower limit for lubricating the gear bearing. Avoid mechanical resonance. To prevent machine stoppage caused by inverter tripping. Signal during Frequency Missing Details Commercial/Inverter Selector Circuit Possible to change commercial/inverter without stopping motor. Motor IM User s Requirements Operate using variable torque Operate using control circuit terminal Frequency reference range 4 to 20mA Speed search function Coast to stop Continue operation even if failure occurs in frequency reference Function and Parameter Settings CT/VT selection C60= Reference selection b0, 02= Terminal A2 single level selection H08=2 Terminal A2 function selection H09=2 Terminal A and A2 switching H= Multifunction input H05=6 or 62 Stopping method selection b0= Operation when frequency reference is missing L405= Reference loss signal H202=0 C Note: In this case, be sure to coast to a stop when selecting inverter stopping method. Applicable Varispeed F7 Function Use the speed search operation. Apply the variable load V/f. Apply the torque limit function. Select the momentary power loss reset and restart mode. Select the automatic continues operation mode when frequency reference is missing. Turn the monitor to the output power indication. Monitor display U08 Use the frequency reference lower limit. Use the preset frequency band prohibition function (frequency jump control). Up to frequencies prohibited. Use the fault retry function. Function and Parameter Settings Multifunction input H0 to 05=6 or 62 V/f selection E0=05 or 07 Torque limit L70=000 % Momentary power loss protection L20=0 to 2 Operating single selection L405=0 to Frequency reference is missing H20 to 0=0 C Frequency reference lower limit d202=0 to 0 % Jump frequency d0 to 0=0 to 400 Hz Jump frequency width d04=0 to 20.0 Hz Fault retry count L50=0 to 0 times Supply R S T (Target Setting) Application Example General Pump Chemical Feeding Pump Warm/Cold Water Circulation Pump Discharge Pump MCCB +V A AC (Detected Value) 4 to 20 ma A2 Sensor R S T S Run/Stop S7 PID Control Cancel SC +5V (Target Value) PID (Detected Value) Varispeed F7 Digital Operator Frequency Reference Value User s Requirements Easy automatic control. Anaiog Monitor Save energy since the load is not heavy at lowspeed operation. Keep the mixed water ratio constant. Manual/Auto switching function. Ammeter for monitoring load conditions. Drive the pump directly using 420mA signal. U V W Function to maintain minimum speed. Run the system using the commercial power supply when an emergency occurs, then return to inverter. Function that can keep the system working without resetting it even when a momentary power loss occurs. Keep a constant water level inside a tank using a water gauge. Keep the monitor min aboue the minimum because if the min is too low, water flows in the reverse direction. FM AC M M2 F (Detected Value) Motor IM During Run Frequency Meter User s Requirements Operate using variable torque PID control PID control characteristics adjustment Feedback signal 4 to 20 ma Meter indication of motor current or output frequency Function and Parameter Settings CT/VT selection C60= PID control selection b50= or 2 PID adjustment b502 to 0 PID control cancel H0 to 05=9 Terminal A2 signal level selection H08=2 Terminal A2 function selection H09=0B Analog monitor selection H40, 04= to 8 Note: Be sure to set the PID feedback signal at terminal A2 or RP. Applicable Varispeed F7 Function Use PID function inside the inverter. (External PID control is not required.) Available with standard function (open loop vector control) Directly input PID output (4 to 20 ma) Use the master / Aux. switching functions. Two toggle switches do the job. Use an anlog monitor (2CN provided as standard) Use external terminals A2 and AC. Use the lowerlimit of the reference frequency. Use a selector circuit together with the speed search function to restart turning motor. Use the continuous operation function to restart after momentary power loss within two seconds. Use toggle switch for start and stop. Read signals directly sent from the waterlevel adjusting unit. (4 to 20 ma). Control the water level by PID control. Use the lowerlimit of frequency reference. Function and Parameter Settings PID adjustment b50 to Control method selection A02=2 Operating single selection b0, 02= Master/Aux. switching H0 to 05=0 Output selection function H40,04=02,0 Run signal selection b0, 02= Frequency reference lower limit d202=0 to 0 % Speed search function selection H0 to 05=6 or 62 Momentary power loss protection L20=0 to 2 Run signal selection b0, 02= PID control b50 to setting Frequency reference lower limit d202=0 to 0 % *Above mentioned scheme and parameter settings correspond to F7 drives, however the same application can be addressed using other models. 8 *Above mentioned scheme and parameter settings correspond to F7 drives, however the same application can be addressed using other models. 9

12 General Information Notes L&T SWITCHGEAR An AC or DC reactor should be installed in the following conditions: to suppress harmonic currents. to suppress peak currents when power factor correction capacitors in the power supply network are switched. when the drive is connected to the same power supply system with thyristor converters like DC drives. When running a specialized motor or more than one motor in parallel from a single drive, the capacity of the drive should be larger than. times of the total motor rated current. Terminals B, B2, F, +, +2, are provided for connecting optional features for the drive. Do not connect other equipment designed by other manufacturers. Acceleration / deceleration times are affected by how much torque the motor generates the load torque. Never connect the power supply lines to output terminals U/T, V/T2 or W/T. Doing so will destroy the drive. Be sure to perform a final check of all sequence wiring and other connections before turning the power on. Make sure there are no short circuits on the control terminals (+V, AC, etc.), as this could damage the drive. As a general principle, the user should avoid opening and closing the magnetic contactor between the motor and the drive during run. Doing so can cause high peak currents and over current faults. If magnetic contactors are used to bypass the drive by connecting the motor to the power supply directly, make sure to close the bypass not before the drive is stopped and fully disconnected from the motor. If the motor start running even while coasting, select the speed search functions. Set up delayed release when using a magnetic contactor to handle momentary power loss. In case of submersible motor, since rated current is greater than a standard motor, select the drive capacity accordingly. Be sure to use a large enough motor cable to avoid decreasing the maximum torque level on account of voltage drop caused by a long motor cable. Variable speed drives are not designed for operating single phase motor. Using a capacitor to start the motor causes excessive current to flow into the capacitor, potentially causing damage. A slitphase start or a repulsion start can end up burning out the starting coils because the internal centrifugal switch is not activated. The drive can only be used with three phase motors. 20 2